# iOS SDK Migration Validation

## Local Validation Results

### Build (`./sdks/ios/dev/build`)

- [x] Rust cross-compilation succeeds for all targets (aarch64-apple-ios, aarch64-apple-ios-sim, aarch64-apple-darwin)
- [x] xcframework created at `sdks/ios/.build/LibXMTPSwiftFFI.xcframework`
- [x] Swift package builds successfully (108 files compiled)

### Format (`./sdks/ios/dev/fmt`)

- [x] Format check runs successfully
- [x] 0/105 files require formatting

### Lint (`./sdks/ios/dev/lint`)

- [x] SwiftLint runs on Sources/
- [x] SwiftLint runs on Tests/
- [x] Only pre-existing warnings (closure parameter position, function body length)

### Test (`./sdks/ios/dev/test`)

- [ ] Tests run against local docker backend - BLOCKED: requires `dev/up` to complete building validation service

## Nix iOS Shell Configuration

The iOS Nix shell required significant configuration for cross-compilation:

### Key Configuration (nix/ios.nix)

- `DEVELOPER_DIR` set to Xcode path for iOS SDK access
- `SDKROOT` unset to allow xcrun SDK discovery per target
- `CC_<target>` and `CXX_<target>` use system clang for iOS targets (Nix clang adds macOS-only flags)
- `CARGO_TARGET_*_LINKER` use system clang for iOS targets (avoids Nix's macOS-only libraries)
- `BINDGEN_EXTRA_CLANG_ARGS_<target>` provide sysroot and target triple for iOS SDK header discovery
- `PATH` prepended with Xcode's bin for `xcodebuild -create-xcframework` support

### Dropped Targets

- x86_64-apple-ios (Intel simulator) dropped - Apple Silicon is standard, and this target conflicts with Nix's macOS-only openssl

## API Updates Required

The following FFI method names changed and required iOS SDK updates:

| Old Name | New Name | File |
|----------|----------|------|
| `findOrCreateDm(targetIdentity:)` | `findOrCreateDmByIdentity(targetIdentity:)` | Conversations.swift:467 |
| `findOrCreateDmByInboxId(inboxId:)` | `findOrCreateDm(inboxId:)` | Conversations.swift:502 |
| `createGroup(accountIdentities:)` | `createGroupByIdentity(accountIdentities:)` | Conversations.swift:570 |
| `createGroupWithInboxIds(inboxIds:)` | `createGroup(inboxIds:)` | Conversations.swift:645 |

## CI Configuration

### lint-ios.yaml

- [x] SwiftLint job configuration correct
- [x] SwiftFormat job configuration correct
- [x] Path filters set correctly

### test-ios.yaml

- [x] Fly.io deployment step configured
- [x] Build step uses Nix shell
- [x] Test step receives backend URLs
- [x] Cleanup step runs on failure

### cleanup-ios.yaml

- [x] Cron schedule correct (hourly)
- [x] Uses updated app prefix (libxmtp-ios-test)

### docs-ios.yaml

- [x] Path filters set correctly
- [x] Jazzy generation configured

## Notes

- Swift package has pre-existing warnings (Swift 6 Sendable, deprecated protobuf APIs) - not introduced by migration
- SwiftLint has pre-existing warnings (closure_parameter_position, function_body_length) - not introduced by migration
- Backend setup (`dev/up`) requires building validation service which takes additional time
